Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1972_12_1_a9, author = {A. M. Olevskii}, title = {On operators generating conditional bases in a {Hilbert} space}, journal = {Matemati\v{c}eskie zametki}, pages = {73--84}, publisher = {mathdoc}, volume = {12}, number = {1}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1972_12_1_a9/} }
A. M. Olevskii. On operators generating conditional bases in a Hilbert space. Matematičeskie zametki, Tome 12 (1972) no. 1, pp. 73-84. http://geodesic.mathdoc.fr/item/MZM_1972_12_1_a9/